For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningBraking
Braking action involves perception time and reaction time. Deciding to push the
brake pedal is perception time. Actually doing it is reaction time.
Average driver reaction time is about three-quarters of a second. In that time,
a vehicle moving at 100 km/h (60 mph) travels 20m (66 ft), which co ...
Transmission Messages
SERVICE TRANSMISSION
This message displays if there is a problem with the transmission. See your dealer.
TRANSMISSION HOT — IDLE ENGINE
This message displays and a chime sounds if the transmission fluid in the vehicle
gets hot. Driving with the transmission fluid temperature high can cause dama ...
Rear Compartment Lid Adjustment
Rear Compartment Lid
Caution: Refer to Fastener Caution in the Preface section.
Procedure
Loosen the rear compartment lid hinge bolt (Qty: 4) to
adjust the rear compartment lid.
Adjust the rear compartment lid in order to obtain an even gap between
the rear compartment ...